Yes, to do a basic conversion all you have to do is open them in the new version. A couple things to bear in mind though:
First, when they finish loading you may get a dialog box listing several "warnings". This is potentially important information that you want to look at carefully. The dialog has a button that allows you to save the data to a file. Do so, and review it to see if there is anything of significance. For example you might find that a function you are using has be deprecated and you will have to recode that particular operation or change the way you perform the operation.
Second, remember that this conversion is a one-way process. You can't convert the VIs back to the older version so be sure to have backups of all the code before you start.
Third, test the converted code carefully. There can be subtle changes in the way built-in functions operate that can make a big difference in your code's operation - especially when jumping 3+ major revisions.
Mike..
